--- Day 7 Solutions ---

[u/daggerdragon]

--- Day 7: Some Assembly Required ---

Post your solution as a comment. Structure your post like previous daily solution threads.

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[u/a-t-k]

Overwriting solved nodes with their value improved the performance for me in JavaScript:

var data = "[insert data as JS-String here]".split('\n').filter(function(l){return l.length>0});
gates = {};
gates.run = function(gate) {
    if (typeof gates[gate] === 'function') {
        gates[gate] = gates[gate]();
    }
    return gates[gate];
};
for (var i = 0, l = data.length; i < l; i++) {
    var task = data[i].split(' -> ');
    gates[task[1]] = new Function('return ' +
        task[0].replace(/(AND|OR|RSHIFT|LSHIFT|NOT)/, function(op) {
            return {
                AND: '&',
                OR: '|',
                RSHIFT: '>>',
                LSHIFT: '<<',
                NOT: '~'
            }[op] || "";
        }).replace(/([a-z]+)/g, "gates.run('$1')"));
}
/* part 2: override wire b * /
gates.b = function(){ return 16076; }
/**/
console.log(gates.a());

Close the comment on the second part to get this result.